Fibromyalgia (pronounced fy-bro-my-AL-ja) is a common and complex chronic pain disorder that affects people physically, mentally and socially. Fibromyalgia is a syndrome characterized by chronic widespread pain, multiple tender points, abnormal pain processing, sleep disturbances, fatigue and often psychological distress. For those with severe symptoms, fibromyalgia can be extremely debilitating and interfere with basic daily activities.